I am looking for a good RSS reader that is low on system resources and uses Growl for notifications. What I would really like is to be able to set certain feeds to notify me a different way. I like to keep an eye on several "Deal" sites, so a notification that pops up and stays up would be great. BTW, I use Thunderbird for email, but the RSS reader doesnt seem to give notifications with Growl, only emails. Any suggestions?